Revision 1.0
3/18
28/April/2000
MTV130
MYSON
TECHNOLOGY
3.0 FUNCTIONAL DESCRIPTIONS
3.1 SERIAL DATA INTERFACE
The serial data interface receives data transmitted from an external controller. And there are 2 types of bus
can be accessed through the serial data interface, one is SPI bus and other is I2C bus.
3.1.1 SPI bus
While SSB pin is pulled to "high" or "low" level, the SPI bus operation is selected. And a valid transmission
should be starting from pulling SSB to "low" level, enabling MTV130 to receiving mode, and retain "low" level
until the last cycle for a complete data packet transfer. The protocol is shown in Figure 1.
There are three transmission formats shown as below:
Format (a) R - C - D
→ R - C - D → R - C - D .....
Format (b) R - C - D
→ C - D → C - D → C - D .....
Format (c) R - C - D
→ D → D → D → D → D .....
Where R=Row address, C=Column address, D=Display data
3.1.2 I2C bus
I2C bus operation is only selected when SSB pin is left floating. And a valid transmission should be starting
from writing the slave address 7AH to MTV130. The protocol is shown in Figure 2.
VDD
-
9
13
Power supply. Positive 5 V DC supply for internal circuitry and a 0.1uF
decoupling capacitor should be connected across to VDD and VSS.
VFLB
I
10
14
Vertical input. This pin is used to input the vertical synchronizing signal.
It is leading triggered and has an internal pull-up resistor.
INT
O
11
15
Intensity color output. 16-color selection is achievable by combining
this intensity pin with R/G/B output pins.
FBKG
O
12
16
Fast Blanking output. It is used to cut off external R, G, B signals of
VGA while this chip is displaying characters or windows.
BOUT
O
13
17
Blue color output. It is a blue color video signal output.
GOUT
O
14
18
Green color output. It is a green color video signal output.
ROUT
O
15
19
Red color output. It is a red color video signal output.
VSS
-
16
20
Ground. This ground pin is used to internal circuitry.
Name
I/O
Pin No.
Descriptions
P16
P20
MS
B
LSB
SSB
SCK
SDA
first byte
last byte
FIGURE 1. Data Transmission Protocol (SPI)